Clay-mill covering



`(No Model.)

G. o. LITTLE. CLAY MILL GOVERING.

No. 440,172. Patented Nov. 11, 1890.

S14/Danton Geo. CLz'Z'Ze @50i/Cnam@ W@ e. @eww U NITED STATES PATENT OFFICE.'

GEORGE C. LITTLE, OF BETHEL, KANSAS.

CLAY-iVilLL COVERING.

SPECIFICATION forming part of Letters Patent No. 440,172, dated November 11, 1890.

Application filed February 7, 1890. Serial No. 339,535. (No model.)

To all whom t may concern.-

Be it known that I, GEORGE C. LITTLE, of Bethel, Vyandotte county, Kansas, have invented certain new and useful Improvements in Clay-Mill Coverings, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in casings for clay-mills; and it consists in the novel construction hereinafter fully set forth and described.

In the drawings, which illustrate the manner of carrying out my invention, Figure l is a top plan view of a clay-mill provided with my improved covering. Fig. 2 is a central vertical section through the same, showing the manner in which the coverings are secured in position; and Fig. 3 is a rear view of said covering.

Referring to the drawings by letter, A represents my invention, and B the top covering, which is composed of two pieces of sheet metal and riveted together in a suitable manner, so as to leave a space between them of about one-fourth of an inch. C are the sides of said casings, composed of wood or other suitable material and secured in the proper manner.

D is the rear casing constructed in the mannel' and shape illustrated in Fig. 3, the inner covering D forming a chute for the pulverized clay after it has passed through the mill K.

Eis a casing made iu the same manner as B, which passes over the front of the mill.

Said casings B, D, and E are composed of metallic sheets, as heretofore described, being secured by suitable bolts to the angle-strips b, d, d', and c for holding said metallic sheet in such a position as to forma chamber between the sheets, as illustrated in Fig. 2. The spaces thus formed are for the purpose of admitting steam between the casings, said steam keeping the casings heated, thereby preventing the clay from sticking to them.

F is a feeding-hopper through which the clay is fed into the mill K.

Gisasteam-pipe, which conducts the steam from the top casing B into the front casing E, said steam-pipe G, having proper couplings g and g for securing it to said casings B and E.

H is a suitable valve by which the steam is let out of rear casings D.

a is a steam-supply pipe by which steam is admitted into the top\ casing B from the steam-boiler. It then passes through the chamber between the caisings B B, then up through the pipe Gr into the tront casing E, from thence downward and out through valve f to a discharge-pipe, which may be carried back to the boiler or an y other suitable place.

c is a valve similar to a, by which steam is admitted to the rear casing D, where it passes downward and out through discharge-valve H.

K represents the mill made in the ordinary manner.

7.: is a pulley-wheel, around which operates a suitable belt, that is provided with cups 7s', which conveys the clay up to the bolt-ingsieve.

Heretofore mills have been constructed with an ordinary wood casing, or if the casing was composed of metal it was never designed to be kept in a heated state. Consequently the clay being thrown into the mill on coming in contact with the revolving' grinders K would be thrown against the sides of casings, and the fine particles would remain sticking to said casings, and in a very short while the entire mill wouldbecome clogged in such a manner th at the machinery would have to be stopped a sufficient length of time to remove the clay from the mill. -This not only causes much loss of time and labor, but produces more wear to the machinery than is necessary. By using my improved casings and having them heated by steam or its equivalents, the clay, as it is thrown against them, will not adhereto them, but will fall away and pass down the inclined casing D', where it is taken by cups 7c and conducted away, and having said casing made in this manner the machinery, instead of becoming rusted and corroded, will wear bright and run smoothly as long as the casings are kept heated.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A pug-mill casing composed of the front and rear coverings B, D,andE, made of sheet metal and securely riveted to angle-strips b, d, d', and e, said coverings having achamber IOO between them, through which the steam passes for keeping the coverings heated, the coverings B and D, having valves a and c, through which the steam is admitted to said chambers, 5 substantially as described.

2. A pug-mill casing composed of the coverings B, D, and E, constructed as hereinbefore described, a coupling-pipe G, connecting coverings B and E, said covering E having a 1o discharge-valve f at its lower end, the covering D having a valve c, through which steam is admitted, and a discharge-valve H, said covering D having an inclined portion D',

which serves as a chute to carry the clay down to the cups 7c', substantially as described. 15 In testimony whereof I aiX my signature in presence of two Witnesses.

GEORGE C. LITTLE. Witnesses:

R. A. BALDERsoN, HATTIE PRICE. 

